Vilk is among a growing number of Israeli soldiers speaking out against the 15-month conflict and refusing to serve anymore, saying they saw or did things that crossed ethical lines. While the movement is small — some 200 soldiers signed a letter saying they’d stop fighting if the government didn’t secure a ceasefire — soldiers say it’s the tip of the iceberg and they want others to come forward.

Their refusal comes at a time of mounting pressure on Israel and Hamas to wind down the fighting. Ceasefire talks are underway, and both President Joe Biden and President-elect Donald Trump have called for a deal by the Jan. 20 inauguration.